What should one do if they swore an oath and then wanted to go back on it, and does it necessitate an expiation?

It is permissible to retract an oath if it does not involve committing a forbidden act, but expiation is required. However, if retracting an oath involves committing a sin, then it is not permissible to retract it; rather, one must fulfill the oath.

An oath cannot be dissolved without expiation or breaking it.